JAVA聊天3、当机器内装有多个SDK版本时，如何查看所用的是哪个SDK？ java -verbose 在出现的屏幕信息中可以看出系统装载的是哪个目录下的文件。-Java Chat 3, when the machines contain a number of SDK version, see how it is used in which SDK? Java-verbose in the screen information can be seen loading system which